2021 Porsche Cayenne — E-Hybrid

The 2021 Porsche Cayenne E-Hybrid shipped with 6 different factory tire sizes, depending on the wheel package it left the factory with (this can also reflect a staggered front/rear setup). Check your tire sidewall or door placard to confirm which one applies to your vehicle.

This trim shipped with more than one tire size (staggered fitment, front/rear, or optional wheel package). Confirm which one matches your vehicle by checking your tire sidewall or door placard.

275/45R20 (Front)

Section width275 mm
Aspect ratio (sidewall height)45% (123.8 mm)
Rim diameter20"
Overall tire diameter~29.7"
Revolutions per mile~678

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305/40R20 (Rear)

Section width305 mm
Aspect ratio (sidewall height)40% (122 mm)
Rim diameter20"
Overall tire diameter~29.6"
Revolutions per mile~681

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285/40R21 (Front)

Section width285 mm
Aspect ratio (sidewall height)40% (114 mm)
Rim diameter21"
Overall tire diameter~30"
Revolutions per mile~673

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315/35R21 (Rear)

Section width315 mm
Aspect ratio (sidewall height)35% (110.3 mm)
Rim diameter21"
Overall tire diameter~29.7"
Revolutions per mile~679

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285/35R22 (Front)

Section width285 mm
Aspect ratio (sidewall height)35% (99.8 mm)
Rim diameter22"
Overall tire diameter~29.9"
Revolutions per mile~676

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315/30R22 (Rear)

Section width315 mm
Aspect ratio (sidewall height)30% (94.5 mm)
Rim diameter22"
Overall tire diameter~29.4"
Revolutions per mile~685

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What this size means for your Porsche Cayenne

On the 2021 Porsche Cayenne E-Hybrid, the factory 275/45R20 measures about 29.7″ in overall diameter with a 123.8 mm (4.9″) sidewall, and completes roughly 678 revolutions per mile. Its 45-series aspect ratio gives a low-profile sidewall tuned for sharper handling, common on sport trims and larger-wheel packages. In tire terms it is a large-diameter fitment.

This is a staggered setup: the front axle runs 275/45R20 and the rear runs 305/40R20. The two sizes are not interchangeable, so order each for its correct axle and don't rotate front-to-rear.

Other 2021 Porsche Cayenne trims

Porsche Cayenne tire sizes by year

See every Porsche Cayenne year & trim →

How to read a tire size

A tire size like 225/45R17 breaks down into three parts: the first number is the section width in millimeters (the tire's width from sidewall to sidewall), the second is the aspect ratio — the sidewall's height as a percentage of that width — and the number after the "R" is the rim diameter in inches. A letter prefix (P or LT) indicates Passenger or Light Truck construction; its absence usually means Euro-metric sizing.

Some trucks and off-road tires instead use "flotation" sizing, like 37X12.50R17 — here the numbers are the tire's overall diameter and width in inches directly, with the rim diameter last.

Always verify against the tire information placard on your driver's-side door jamb or your owner's manual before purchasing — tire size can vary by factory option package even within the same trim.